LP28019B

LP28019B – 01

Aug-2017

www.lowpowersemi.com

Page 1 of 7

1A Single Chip Li-Ion and Li-Polymer Charger

General Description

The LP28019B is a complete constant-current/ constant voltage

linear charger for single cell lithium-ion battery. Its ESOP8

package and low external component count make the

LP28019B ideally suited for portable applications. No external

sense resistor is needed, and no blocking diode is required due

to the internal MOSFET architecture. Thermal feedback

regulates the charge current to limit the die temperature during

high power operation or high ambient temperature. The charge

voltage is fixed at 4.2V, and the charge current can be ISET

programmed externally with a single resistor.

The LP28019B automatically terminates the charge cycle when

the charge current drops to 1/10 setting current value after the

final float voltage is reached.

When the input supply is removed, the LP28019B automatically

enters a low current state, dropping the battery drain current to

less than < 1µA.

Other features include charge current monitor, under voltage

lockout, automatic recharge and a status pin to indicate charge

termination and the presence of an input voltage.

Order Information

LP28019B □ □ □ □

F: Pb-Free

Package Type

SP: ESOP8

Charge Voltage

Default：4.2V

Applications



Portable Media Players/Game



Power Bank



Bluetooth Applications



PDA/MID

Features



input voltage up to 28V



input Over Voltage Protection：7V



Short-circuit protection



Programmable Charge Current:300mA to 1000mA



< 1µA Battery Reverse Current



Protection of Reverse Connection of Battery



No MOSFET, Sense Resistor or Blocking Diode Required



Constant-Current/Constant-Voltage Operation with

Thermal Regulation to Maximize Charge Rate Without

Risk of Overheating



ESOP8 Package



RoHS Compliant and 100% Lead (Pb)-Free

Typical Application Circuit

CHRG

GND

LP28019B

Battery

VIN

1K

LED2

BAT

NC

10uF

ISET

RISET

1uF

VIN

1

5

8

2

4

3/6/7

Marking Information

Device

Marking

Package

Shipping

LP28019BSPF

LPS

LP28019B

YWX

ESOP8

4K/REEL

Marking indication:

Y:Production year W:Production week X: Series Number